JP5917105B2 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
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- JP5917105B2 JP5917105B2 JP2011255911A JP2011255911A JP5917105B2 JP 5917105 B2 JP5917105 B2 JP 5917105B2 JP 2011255911 A JP2011255911 A JP 2011255911A JP 2011255911 A JP2011255911 A JP 2011255911A JP 5917105 B2 JP5917105 B2 JP 5917105B2
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- oxide semiconductor
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- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/68—Types of semiconductor device ; Multistep manufacturing processes therefor controllable by only the electric current supplied, or only the electric potential applied, to an electrode which does not carry the current to be rectified, amplified or switched
- H01L29/76—Unipolar devices, e.g. field effect transistors
- H01L29/772—Field effect transistors
- H01L29/78—Field effect transistors with field effect produced by an insulated gate
- H01L29/786—Thin film transistors, i.e. transistors with a channel being at least partly a thin film
- H01L29/78696—Thin film transistors, i.e. transistors with a channel being at least partly a thin film characterised by the structure of the channel, e.g. multichannel, transverse or longitudinal shape, length or width, doping structure, or the overlap or alignment between the channel and the gate, the source or the drain, or the contacting structure of the channel
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- Ceramic Engineering (AREA)
- Computer Hardware Design (AREA)
- Manufacturing & Machinery (AREA)
- Thin Film Transistor (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Liquid Crystal (AREA)
- Electroluminescent Light Sources (AREA)
- Physical Deposition Of Substances That Are Components Of Semiconductor Devices (AREA)
Description
本実施の形態では、図1(A)に示すトップゲート型トランジスタの作製方法の一例を以下に示す。
実施の形態1ではトップゲート型のトランジスタの例を示したが、本実施の形態では、図1(B)に示すボトムゲート型のトランジスタの例を説明する。なお、図1(A)と同じ箇所には同じ符号を用いて説明する。
本実施の形態では、ウルツ鉱型(第1の結晶型)の結晶を含む酸化物半導体膜と、第1の結晶型とは異なる第2の結晶型の六方晶系の異方性結晶を含む酸化物半導体膜の積層について図5乃至図9を参照して説明する。
本実施の形態では、同一基板上に少なくとも駆動回路の一部と、画素部に配置するトランジスタを有する表示装置を作製する例について以下に説明する。
本明細書に開示する半導体装置は、さまざまな電子機器(遊技機も含む)に適用することができる。電子機器としては、例えば、テレビジョン装置(テレビ、またはテレビジョン受信機ともいう)、コンピュータ用などのモニタ、デジタルカメラ、デジタルビデオカメラ等のカメラ、デジタルフォトフレーム、携帯電話機(携帯電話、携帯電話装置ともいう)、携帯型ゲーム機、携帯情報端末、音響再生装置、パチンコ機などの大型ゲーム機などが挙げられる。上記実施の形態で説明した表示装置を具備する電子機器の例について説明する。
101:下地絶縁層
102:酸化物半導体層
102a:酸素の高濃度領域
102b:中間領域
102c:窒素の高濃度領域
103:ソース電極層
104:ドレイン電極層
105:ゲート絶縁層
106:ゲート電極層
107:保護絶縁層
110:トランジスタ
111:トランジスタ
112:トランジスタ
113:トランジスタ
3001 本体
3002 筐体
3003a 表示部
3003b 表示部
3004 キーボードボタン
5001 表示部
5002 ヒンジ
5003 表示パネル
5004 操作ボタン
5005 携帯電話
5006 タッチ入力ボタン
7001 発光素子駆動用トランジスタ
7002 発光素子
7003 電極
7004 EL層
7005 電極
7008 電極
7009 隔壁
7010 基板
7011 発光素子駆動用トランジスタ
7012 発光素子
7014 EL層
7015 電極
7016 遮蔽膜
7017 電極
7019 隔壁
7020 基板
7021 発光素子駆動用トランジスタ
7022 発光素子
7024 EL層
7025 電極
7027 電極
7029 隔壁
7030 ゲート絶縁層
7031 ゲート絶縁層
7032 絶縁層
7033 カラーフィルタ層
7034 オーバーコート層
7035 保護絶縁層
7040 ゲート絶縁層
7041 ゲート絶縁層
7042 絶縁層
7052 保護絶縁層
7053 平坦化絶縁層
7055 絶縁層
9600 テレビジョン装置
9601 筐体
9602 記憶媒体再生録画部
9603 表示部
9604 外部接続端子
9605 スタンド
9606 外部メモリ
Claims (5)
- ゲート電極層と、
該ゲート電極層と接する第1の絶縁層と、
該第1の絶縁層に接する酸化物半導体層と、
該酸化物半導体層に接する第2の絶縁層とを有し、
前記酸化物半導体層は、非単結晶であり、
前記酸化物半導体層は、前記第1の絶縁層に近いほど高くなる窒素濃度の濃度勾配を有し、且つ、前記第2の絶縁層に近いほど高くなる酸素濃度の濃度勾配を有することを特徴とする半導体装置。 - 請求項1において、前記酸化物半導体層のうち、前記第1の絶縁層との界面近傍の領域は他の領域に比べて結晶性が高いことを特徴とする半導体装置。
- 請求項1または請求項2において、前記酸化物半導体層のうち、前記第1の絶縁層との界面近傍の領域は、ウルツ鉱型の結晶構造を有することを特徴とする半導体装置。
- 請求項1乃至3のいずれか一において、前記第1の絶縁層と前記酸化物半導体層の界面近傍の窒素濃度は、1×1020/cm3以上7原子%未満であることを特徴とする半導体装置。
- 請求項1乃至4のいずれか一において、前記第2の絶縁層と前記酸化物半導体層の界面近傍の窒素濃度は、1×1017/cm3以上5×1019/cm3未満であることを特徴とする半導体装置。
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